What It Scores
BIKER is a valid word in the tournament list this site uses. Tile values only, before any premium square: 11 in Scrabble and 12 in Words With Friends. The letters break down as B3 I1 K5 E1 R1.
Words Made From The Letters In BIKER
26 shorter words come out of these tiles. On a board that matters more than the long play, because a short word on a premium square often beats a long one on plain squares.
4 letter words (12)
3 letter words (9)
2 letter words (5)
Longer Words Containing BIKER
BIKER appears inside each of these, which is what makes it worth knowing as a hook.
Next: the Word Unscrambler for any letters at all. Full entry and definition at Merriam-Webster.